UIKeyboard delegate on ".?123" key - iphone

Question

Does anyone have an idea if we get a delegate call back from the keyboard when ".?123" button is tapped on it? We have put a customized number pad on the text keypad and want to remove it once user taps on ".?123" button to avoid duplicate keys.
Any suggestions.

Answer 1

There isn't any notification that will give you what you want. In fact, there isn't any public API that gives you access to the keyboard at that level. The only way I can think of to do this, is to put a transparent button over top the .?123 key, and detect that, and then pass on the touch to the underlying button. The button views are buried very deeply in the view hierarchy. I used this code to first, find the keyboard, and then log the views (UIKBKeyViews) that include that button. The five views in the log below appear to be the uppercase,backspace,.?123,spacebar, and return views.
-(void) keyboardUp: (NSNotification*) notification { // called from UIKeyboardDidShowNotification
UIWindow *tempWindow = [[[UIApplication sharedApplication] windows]objectAtIndex:1];
UIView *keyboard;
for(int i = 0; i < [tempWindow.subviews count]; i++) {
keyboard = [tempWindow.subviews objectAtIndex:i];
if([[keyboard description] hasPrefix:#"<UIKeyboard"] == YES) {
// NSLog(#"Keyboard subviews are: %#",keyboard.subviews);
NSLog(#"%#",[[[[[[[[[[[[[UIApplication sharedApplication] windows]objectAtIndex:1] contentView]subviews]lastObject]subviews]lastObject]subviews]lastObject]subviews]lastObject]subviews]);
}
}
}